Regenerative furnace



7 Sheets-Sheet 1.

(No Model.)

S. R. SMYTHE. REGENERATIVE FURNACE.

1 ME Inn. m/um? b egz /i m;

Patented Aug. 5, 1890.

IILIHI'LEEBES ESWAMM we mums PETERS co, FNOY0-LITHO., WASHINGTON. n. c.

7 Sheets-Sheet 2.

(No Model.)

S. R. SMYTHB. REGENBRATIVE FURNACE. No. 433,604. Patented Aug. 5,1890.

M11 EEEES 'JE 1011 swlwwm' SW C a 31 a /u. 7 Z0571 Mk];

(No Model.) 7 Sheets-Sheet 3 s. R. SMYTHE.

REGENERATIVE PURNAGE. No. 483,604. Patented Ai1g.5, 1890.

(No Model.) 7 Sheets-Sheet 4.

S.R. SMYTHE.

REGENERATIVE FURNACE.

No. 433,604. Patented Aug 5, 1890.

W12 EBEEE I \Fa. n11

7 Sheets-Sheet 5i.

Patented Aug. 5, 1890.

S. R. SMYTHE.

REGENBRATIVE FURNACE.

(No Model.)

(No Model.) 7 Sheets-Sheet 6. S. R. SMYTI-IE.

% REGENERATIVB FURNACE. No. 438,604. Patented Aug. 5, 1890.

. UNITED STATES:

PATENT OFFICE;

SAMUEL R. SMYTHE, OF ALLEGHENY, PENNSYLVANIA.

REG EN ERATIVE FURNACE.

IPECIFICATION forming part of Letters Patent No. 433,604, dated August 5, 1890. Application filed November 29, 1889- Serial 110,332,064, (N0 model.)

To all whom it may concern:

Be it known that I, SAMUEL R. SMYTHE, a

citizen of the United States, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented or discovered a certain new and useful Improvement in Regenerative Furnaces, of i which improve ment the following is a specification.

Regenerative furnaces having the heatingchamber divided into'two or more-compartmentsor havingtwo or moreindependent heating chambers-such as crucible or soakingpit furnaces-are so constructed that each of the heating-chambers is connected by flues to common gas and air regenerative chambers-that is to say, the furnace is constructed with only two gas and two air regenerative chambers-and each heating compartment or chamber has an uninterrupted connection to the sameregenerative chambers; hence each of said compartments or chambers is equally heated. This equal heating of all the chambers or compartments is undesirable, for the reason that the ingots are not at the same temperature when charged into the f urnace that is to say, some have become chilled and require a greater heat than the others to prepare them for rolling; but greater volumes of gas and air cannot be admitted, as the hot ingots would become too highly heated, and the outer surfaces would melt and waste by oxidation; hence it is customary to put all ingots which have chilled aside until some convenient opportunity, when theyare placed in the furnace and heated. It has also been found in crucible and other furnaces thatone chamber or compartment will work or-heat more rapidly or more slowly than the others, either through some dilference in the construction of the chambers or a difference in the charge.

The object of this invention is to provide for the independentregulation of the heat in each chamber or compartment.

The invention claimed is hereinafter more fully described.

In the accompanying drawings, forming a part of this specification, Figure 1 is a sectional plan view of my improved furnace, the plane of section being indicated on the line i; c, Fig. 2. Fig. 2 is a sectional elevation, the section being taken on the line .9 s, Fig.

1. Fig. 3 is a section on the line an 05, Fig. 2. Figs. 4 and 5 are sectional plan views, the sections being taken on the lines to w and 1525, Fig. 2. Fig. 6 is a vertical section on the line y y, Fig. 2. similar to Figs. 2 and 3, showing the application of my invention to furnaces wherein gas other than producer-gas is employed.

Figs. 7 and 8 are Views the arch forming the tops of these chambers down to the conduit 8, with which each of said chambers has free communication, the lower ends of said walls being supported by arches 9, across the conduit 8, as shown in Figs. 2 and 3. The air regenerative chambers 6 6 6 &c.,' are similarly separated from each other by curtain-walls 10, which are supported at their lower ends by arches 11, formed across the conduit 12, connected to each of the air regenerative chambers and to the stack. 'As is customary, the air and gas chambers are separated by a partition-wall 13, as shown in Figs. 2, 4, and 5.

Each of the gas-chambers 5 5 5*, &c., is connected by passages 14 14 14", &c., with a gas-main 15, arranged alongside of the furnace, as shown in Figs. 1, 2, and 4, and valves 16 16 16 &7C., are arranged preferably at the points of junction of the passages and main for regulating the flow of gas to each of the gas-chambers. of the gas-passages are preferably formed by cast-iron elbows 17 17 17 &c., Whose upper ends extend above the lower ends of the curtain-walls 7, so as to insure the discharge of gas from the passages into their respective regenerative chambers only, as shown in Figs. 2, 3, and 4.

The air regenerative chambers 6 G 6 &c., are connected with the open air, or with a source of supply of air under pressure, by passages 18 18 18, 850., whose inner .ends are The inner or discharge ends preferably formed by cast-iron elbows or pipesections 19 19 19 &c. The upper or discharge ends project a sufficient distance up into the air-chambers, as shown in Figs. 2, 3, and 4:, to insure the flow of air from each passage into its respective regenerative cham bers, the flow of the air being regulated by valves 20 20 20 &c., arranged by preference at the outer ends of the air-passages.

As shown in Figs. 1, 2, 4, and 5, each side of the furnace is provided with a similar arrangementof gas and air regenerative. chambers having similar connections with the heating-chambers, the gas and air supply, and with the conduits 8 and 12. These conduits 8 and 12 on each side of the furnace are connected by conduits 21 with a common chamber 22, in which is arranged a valve 23, whereby either conduit 21 may be connected with a conduit 24, extending from the chamber 22 to the stack 25.

In adapting my furnace to the employment of a gas which does not require preheatinge. 9., natural or water gas-the gas-regenerating chambers are omitted, the air-regenerating chambers only being required, as shown in Figs. 7 and 8. The gas is introduced into the furnace by means of pipe-sections 26, so arranged through the outer wall of the furnace as to direct the gas into the dues or ports 4, connecting the air-chambers 6 6 6 &c., with the heating-chambers, as shown in Fig. 8. It is preferred to provide two burners or pipe-sections-one above the other-for each flue or port, and so arrange them as to deliver the gas at an angle to the upward-flowing currents of air. Each set of burners is provided with aregulating-valve 27, and the series of burners for each heating-chamber is connected by a branch 29; having a valve 30, with the gas-main. (Not shown.) It will be observed that the valves 16 and 30 correspond in function, both being designed to regulate theflow of gas to the heating-chambers. The construction of the air-regenerating chambers 6 6 6 &c., and their connections with the air-supply, heating-chamber, and the stack is the same as hereinbefore described.

The distinguishing characteristics of this improvement consist in the provision, in a furnace having a series of heating or melt ing chambers, of an independent and valved connection between each of such chambers and the gas-supply, a regenerative chamber for each heating-chamber, the regenerative chambers having independent valved connections with the air-supply and a connection to the stack common to all the heating-chambers. Itwill be readily understood that in such a construction the f urnace-man will have entire and complete control of the heat in each of the heating-chambers, and that a high heat can be had in one chamber while that in another can be reduced to any desired extent.

WVhile I have described and shown my improvements as embodied in a furnace for heating ingots, said improvements are equally applicable to crucible and other furnaces for heating or melting, wherein the articles to be treated are placed in separate compartments or chambers. 4

I claim herein as my invention 1. In a regenerative furnace, the combination of a series of two or more heating or melting chambers, a series of two or more valved connections for supplying gas independently to each of said chambers, a series of two or more independent air-regenerating chambers at each side or end of the meltingchambers, each of the regenerating-chambers having independent valved connections to the air-supply, and a conduit common to all the heating-chambers for conducting the products of combustion to the stack, substantially as set forth.

2. In a regenerative furnace, the combination of a series of two or more heating or melting chambers having at each end thereof a series of two or more independent gas-regenerating chambers and a series of two or more independent air-regenerating chambers, each of the regenerating-chambers having independent valved connections to the gas and air supply and to the heating or melting chambers, and conduits common to all the regenerative chambers for conducting the products of combustion to the stack, substantially as set forth.

3. Ina regenerative furnace, the combination of a series of two or more heating-chambers having at each end thereof a series of two or more independent gas-regenerating chambers and a series of two or more air-regenerating chambers, flues connecting the regenerating-chambers with theheating-chambers, conduits connected with all the regenerating-chambers and with the stack, a series of two or more passages provided with valves for conducting gas to the gas-regenerating chambers, and a like series of passages for conducting air to the airregenerating chambers and provided with valves, substantially as set forth.

In testimony whereof I have hereunto set my hand.

SAMUEL R. SMYTHE.

WVitnesses: I DARWIN S. WoLcoTT,

R. H. WHITTLEsEY. 

